var sShow  	= '';
	var sHide  	= 'none';

	var aLayer	= new Array();
	var aAObj	= new Array();

	function get_layer_obj(ID) {

		if (window.document.all) {
			if (eval("window.document.all."+ID))
				 return eval("window.document.all."+ID+".style");
			else return -1;
		}

		if (typeof(window.document.getElementById)=="function") {
			if (window.document.getElementById(ID))
				 return window.document.getElementById(ID).style;
			else return -1;
		}

		sShow = '';
		sHide = 'none';

		return eval("window.document.layers[iLAssign[ID]]");
	}

	function get_layer_obj_p(ID) {

		if (window.document.all)
			return eval("window.document.all."+ID);

		if (typeof(window.document.getElementById)=="function")
			return window.document.getElementById(ID);
	}

	function show_layer(ID) {
	 	get_layer_obj(ID).display = sShow;
	}

    function hide_layer(ID) {
     	get_layer_obj(ID).display = sHide;
    }

    function tl_teilnehmer(showID, hide1ID, hide2ID) {

		hide_layer(hide1ID);
		hide_layer(hide2ID);
		show_layer(showID);
	}

    function tl_teilnehmer_wg08(showID, hide1ID, hide2ID, hide3ID, hide4ID) {

		hide_layer(hide1ID);
		hide_layer(hide2ID);
		hide_layer(hide3ID);
		hide_layer(hide4ID);
		show_layer(showID);
	}